CC
is the model cycle runtime (i.e. 00, 06, 12, 18) FF
is the 2-digit forecast hour of productFFF
is the 3-digit forecast hour of productxxxx
is the 4-digit forecast hour of productYYYYMMDD
is the Year, Month and DaySN
is the Storm Name

Click on the links under Inventory to see the file's contents.
Multiply-Nested Globally relocatable Models